A 6-year-old has palpable purpura on the buttocks and legs, joint pain, abdominal pain and haematuria after a cold. What is the most likely diagnosis?
Answer and explanation
Correct answer: C. IgA vasculitis (Henoch-Schonlein purpura)
- Step 1: The picture of palpable purpura on the buttocks and legs fits IgA vasculitis (Henoch-Schonlein purpura).
Answer
IgA vasculitis (Henoch-Schonlein purpura).
Why not the others: 'Immune thrombocytopenic purpura': it gives non-palpable purpura with a low platelet count. 'Meningococcal septicaemia': it gives an ill child with a non-blanching rash and fever. 'Kawasaki disease': it gives prolonged fever with conjunctivitis and mucosal changes.
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